#### Answer

The solution is -4

#### Work Step by Step

9a+29 +7=0 Simplify
9a+36=0 Subtract 36 from both sides
9a+36-36=0-36
9a=-36 Divide by 9 on both sides
$\frac{9a}{9}$=$\frac{-36}{9}$
a=-4
The solution is -4
Check
9a+29+7=0 Replace x with -4
9(-4)+29+7=0 Simplify
-36+29+7=0
-7+7=0
0=0